I think that's a fair answer, and I appreciate your response.
While I fully admit I have never visited Dallas, the diagrams that I have seen of the plaza (for instance,
http://mcadams.posc.mu.edu/route.htm), he just seems positioned too far to the right for it to work out the way you are describing it.
I think your explanation is fair, to me it just doesn't seem to fit. In my mind, at the very least, it indicates there was a second shooter, whether or not he was from the front or the rear.
Thanks again for the response.
I think you should try to pinpoint the car at the third shot in relation to the street and the sixth floor corner. I think that should answer your question.
You can forget about a forward shot. Why quibble about five degrees and then turn it around and try for more than a ninety degree angle that doesn't fit.